Question

A _____ remains when the nitrogen-containing portion of an amino acid is removed. select one:

a. fatty acid
b. ribonucleotide
c. carbon skeleton
d. dipeptide fragment

Answer 1

The correct answer is C.
Amino acids consist of two different parts, the nitrogen-containing portion (NH2 group, dor the amino acid) and the carbon skeleton, containing the COOH, the acidic part. Two amino acids form bonds between their amino and acidic parts and form peptides that build up to proteins.